REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, actual amount	$ 771,441	$ 465,360
Total capital to risk weighted assets, actual ratio	13.40%	14.17%
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount	460,562	262,730
Total capital to risk weighted assets, required for capital adequacy purposes, ratio	8.00%	8.00%
Tier 1 capital to risk weighted assets, actual amount	735,611	428,490
Tier 1 capital to risk weighted assets, actual ratio	12.77%	13.05%
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	230,418	131,338
Tier 1 capital ratio of risk-weighted assets	4.00%	4.00%
Tier 1 capital to average adjusted assets, actual amount	735,611	428,490
Tier 1 capital to average adjusted assets, actual ratio	10.63%	10.70%
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount	276,806	160,183
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio	4.00%	4.00%
Union Bank & Trust [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, actual amount	745,125	442,784
Total capital to risk weighted assets, actual ratio	13.00%	13.56%
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount	458,538	261,229
Total capital to risk weighted assets, required for capital adequacy purposes, ratio	8.00%	8.00%
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount	573,173	326,537
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio	10.00%	10.00%
Tier 1 capital to risk weighted assets, actual amount	709,309	405,925
Tier 1 capital to risk weighted assets, actual ratio	12.37%	12.43%
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount	229,364	130,628
Tier 1 capital ratio of risk-weighted assets	4.00%	4.00%
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount	344,046	195,941
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio	6.00%	6.00%
Tier 1 capital to average adjusted assets, actual amount	709,309	405,925
Tier 1 capital to average adjusted assets, actual ratio	10.30%	10.19%
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount	275,460	159,342
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, amount	$ 344,325	$ 199,178
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, ratio	5.00%	5.00%